Formatting contents of mailto tag

I want to include an email address on a web page which can be clicked on thus opening the visitors default email client with the email address pre-filled. I also want to format (using bold, italics tags etc.) the body of the email. I can't use any server side scripts as I am using a CMS which does not allow me access to the server the site is hosed on.

So is there any way of using HTML and/or Javascript to format the body of the email? I can use HTML to have linebreaks in the body of the email (as in the code fragment below) but when I add bold, italics tags etc. it does not seem to work. Any ideas?

Sorry - you are out of luck.
The assumption that all email clients will be supporting HTML is weak unfortunately.

Many email clients are setup to expressly ignore html. Also - every email client will render your special characters a little bit differently. For example, Outlook wants to see \n for line breaks, while Mac mail wants to see \r\n.
Setting up a plain text mailto containing: to, cc, subject and body are your best compatibility bets.

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